Syringe



G. N. HEIN Aug. 28, 1934.

SYRINGE Filed March 11, 1952 2 Sheets-Sheet 1 ATTORNEY G. N. HEIN Aug. 28, 1934.

SYRINGE 2 Sheets-Sheet 2 Filed March 1l, 1952 Illl INVENTOR.

G50/ees /Y. HE/N.

ATTORNEY v ril/4 Patented Aug. 28, 1934 ENT ori-ics SYRllNGrlif` George N. Hein, San Francisco, Calif. Application March 11, 1932, Serial No. 598,229

`i' claims. (o1. 12s- 231) Tl'iisginventionrelates Vto a syringe, and more particularly to that type of a syringe employing a resilient reiiex bulb.

1t is one object of` this invention to provide a syringe employing a detachable, resilient reiiex bulb having novel means for detachably fixing the bulb to the body of the syringe.

Another object of this invention is to provide a syringe having a resilient reflex bulb, the latter ,l0 being adapted to be formed or molded in a unitary member, and thereby overcome the diiiiculties that have been encountered in the manufacture of such bulbs in a spherical form. y

Another object isy to provide a syringe employing a resilient reflex bulb having novel means for detachably mounting the bulb on the body of the syringe, which attachment shall effect a rigid connection and which will be proof against leakage of either liquid or air when the bulb is under pressure.

Another object is to provide a resilient reflex bulb of novel shape, which will effect both an even and regular expulsion of fluid or gas from the syringe, and also provide a surface on which the syringe may be supported in an upright position.l Another object is to provide a syringe having the abovecharacteristics, wherein the resilient reflex bulb is so constructed thatV the immediate elastic `rebound of the bulb when it is depressed is obtained. l y Another object is to provide a syringe having as a medium to expel the contents thereof, a resilient reiiex bulb in which the pressure of operation tends to more tightly seal the connection betwee thev bulb andthe body of the syringe.

Another object is to provide a syringe having the above characteristics which will operate with smoothness and evenness of resistance during its manipulation to expel the contents, and which 0 provides a substantial flat base at its axial end for supporting the syringe in an upright positio-n.

Another object is to provide a syringe of the type in which a resilient reiiex bulb member is detachably mounted to the syringe body, and means for tightly mounting the bulb on the body, so that the joint is'Y readily manipulated without the use of tools for connecting and disconnecting the bulb from the body. A further object is to provide a syringe having a resilient ejecting medium which can be taken apart vquickly and replaced together, that shall be leak-'proof in action, sterilizable by boiling or otherwise, which permits ready access to both the interna-l and external parts for both inspection and repair, which will be extremely quick in its rebound action and comparatively inexpensive to manufacture. l l

A further object is to provide a syringe having the above characteristics that shall upon collapsing of the resilient body effect a more complete expulsion of the medium from the syringe chamber than any type of syringe employing a resilient reex'bulb known to me.

A still further object is to provide an improved syringe for medical, dental and related practitioners, and which is equally convenient for unskilled persons to operate and keep clean, and thus aord greater cooperation between the professional practitioner and the patient in combating diseases, as well as to promote sanitation and hygiene in all forms where syringe treatment is required. Y

The above and other objects will be apparent to those skilled in the art when taken in connection with the drawings, wherein like reference characters refer to like parts. It is to be specifically understo'cd'that the drawings are not a definition oi the invention, this being more fully deiined by the appended claims.

l In the drawings:-

Fig. 1 is a sectional view of one form of a resilientV reflex bulb embodying the invention.

Fig. 2 is a sectional view of one form of a syringe body embodying the invention.

Fig. 3 is a sectional view taken on line 3'-3 of Fig. 1.

Fig. 4 is a sectional view showing the assembly of Fig. 1 and Fig. 2.

Fig. 5 is a fragmental sectional view of another embodiment of the invention.

Fig. 6 is asectional View of still another embodiment of the invention.

Fig. 7 is a detail View of the attaching means employed in Fig. 6.

Fig. 8 is a sectional view of a syringe showing still another embodiment of the invention.

Fig..9 is a sectional View of a syringe showing still another embodiment of the invention.

Fig. 10 is a fragmental sectional View showing another embodiment of the invention, and Fig. 11 is a sectional view of a syringe showing still another embodiment of the invention.

In general, the invention consists of a bulbous elastic cup-shaped member open at one end and a base member of more rigid material which serves as a body on which the elastic bulbous body is mounted, and means to connect the aforesaid two members.

In the form illustrated by Figs. l to Il inclusive, 10 indicates a syringe body in its entirety, wherein tubular ejector portion 11 is provided, having a discharge nozzle, not shown, and a bowl 12, the latter preferably being circular at an open end 13. The ejector, discharge nozzle and bowl may be' formed in separate` pieces and cooperately mounted by threaded means, as at 14, or other suitable manner, such as friction nt, or the ejector, discharge nozzle and bowl may, if desired, be an integral structure, and this latter form is preferable where the material used is glass. Howlooy ever, it has been found from experience, that the syringe body should, preferably, be made of metal or some substantially unbreakable material.

The bowl l2 is of any desirable receptacle form, and is provided with an opening l5 for receiving the tubular ejector portion 11. The open end 13 of the bowl 12 is adapted to receive and mount in syringe forming relation a closure member, indicated in its entirety by 16, which may be made of any suitable resilient material, such as rubber. This closure member may assumevarious forms largely dependent on the shape and capacity of the syringe bowl, and the individual preference of the user. However, in the present` invention, my preferred forms are bulbous cup-shaped members, as shown in the drawings. These closure members have tight nt with the open end 13 of the bowl, so that there will be no leakage of material at the juncture.

The cup-shaped resilient closure member 16 is provided with an annular side 17 and having a closed end 18 which is formed with a longitudinally axial depression therein of lesser diameter than the exterior diameter oi the bulb and preierably of the shape shown by heavy lines in Fig. 1. This is a very important feature of the invention, as it has been found by experiment that when the closed end of the bulb is formed, having means to stand on end, in the conventional way, as shown by the dotted lines in Fig. 1that upon the initial collapsing of the bulb, a very irregular ejection action from the syringe is obtained. This is due to the internal pressure on the bottom or closed end 18 being transmitted to the annular side wall 17, and bending the wall adjacent to the bottom. Upon reaching the position as indicated by the heavy lines in Fig. 1, a sudden and irregular ejection action takes place.

I have found by experiment that by initially forming the closed end of the bulb, as shown by the heavy lines in Fig. 1, that this irregularity of ejection is overcome, and by further collapsing the bulb a smooth and even ejection stream from the nozzle oi the syringe is obtained.

.llt will be noted that there is shown in all of the illustrated and described exempliiications a beveled contact relationship between the open end of the bulb and the interior wall of the bowl, a generic form of which consists of a downwardly i and inwardly beveled wall interiorly of the bowl,

12, on which the resilient edges at the open end of the bulb may be deformed to make a beveled seat as at 20 in Fig. i and 41 in Fig. 8.

Novel means is provided for attaching the bulb 16 to the body 10, one form of which is illustrated by Figs. 1 to Il inclusive, which consists of forming spiral or slanting grooves on the interior surface of the bowl adjacent the opening i3, as

4 shown at 18.

Embedded within the exterior surface of the annular side wall 17 adjacent the open end of the bulb 16 is provided an annular metallic locking ring member 21 having stamped projections or outwardly curved portions 22, the latter being adapted to extend outwardly from the side wall 17 and to engage and cooperate with the several spiral grooves 18 in the bowl 12, whereby upon positioning the open end of the bulb 16 on the open end 13 of the bowl 10 with the projections 22 registering with the grooves 18, it is only necessary to give the bulb a fraction of a turn axially with the axis oi the bowl 12 to effect a rigid close fit between the bulb 16 and bowl 12. The outer edge oi the open end oi the bulb is adapted to seat on an internal beveled surface provided by the inner wall of the bowl 12, as shown by Fig. 4. These cooperating surfaces are frictionally drawn into close air tight relation during the operation ofconnecting the bulb with the bowl by the connecting means 18 and 22. The provision of the internal beveled surface within the bowl for receiving the open end of the bulb is a very important feature of this invention, as the beveled surface being positioned on the interior of the bowl provides a seat for the open end or the bulb that cannot be effected by exerting pressure on the bulb, while if this beveled seat was positioned externally of the bowl, then when pressure was applied to the bulb, such pressure would tend to separate the contacting surfaces ofmthe bulb and bowl, while the present structure will tend to hold the contacting surfaces oi the bowl and bulb more closely when pressure is applied to the bulb.

Fig. 5 illustrates another embodiment ci the invention which consists of providing a plurality oi spaced projections or lugs 25 on the closed end or bottom of the conventional resilient bulb having a concave bottom. These lugs provide a seat upon which the device may rest, and also acts to stiften the bottom, so that when the bulb is collapsed by pressing the bulb at the portion located between the lugs, the entire bottom acts as a plunger and causes a more complete collapsing o the bulb, and does not interfere with the even action.

It can be understood from the drawings that the portion 26 adjacent the lugs is of greater elasticity than that portion forming the lugs, and causes a quick rebound action of the bulb from collapsed position.

Figs. 6 and 7 illustrate another form or the invention, wherein there is provided novel means for connecting the bulb with the body of the device. This means consists of an internal ring member, indicated in its entirety by Fig. 7. This ring is provided with an enlarged upper portion 27,v which portion forms/a shoulder 28 and an incline 29, the shoulder 28 and incline portion 29 being adapted to nt within 'and cooperate with a corresponding portion 31 provided within the open end of the bulb.

The cup 10 isprovided with an enlarged portion 32 at its open end for receiving the open end of the bulb. The open end of the bulb is provided with a lip portion 33 which is adapted to seat on a beveled portion 34 in the cup.

Internal threaded means 35 is provided within the intermediate portion of the cup 10 for engaging a cooperating means provided on the lower portion of the ring member, so that when the open end of the bulb containing the ring member is positioned within the open end of the cup and given an axial turn, the corresponding lip and beveled portions 83 and 34 are drawn into rigid xed relation.

Fig. 8 illustrates still another form of the invention wherein the external ring member is indicated in its entirety by 37, and having a threaded means for engaging the corresponding threaded means provided adjacent the top of the cup lo and externally thereof, the ring member 27 beinCr provided with an enlarged upper portion 38 forming an internal annular groove for receiving an annular T-shaped i'iange or projection provided adjacent the open end of the bulb. The T-shaped flange 39 cooperating with the inner surface of the enlarged annular portion of the ring prevents any lateral displacement of the bulb at the cooperatingengaging portions 38 and 39. The outer edge of the open endor" the .bulb is provided with ico ice

be made of any suitable stili material, such as metal, hard rubber, or of the general bulb material, the member 43, if separate, may be provided with a seat within the bottom of the bulb, as shown at 44, and may be positioned within the seat 44 by springing the bottom of the elastic bulb. It will be understood from the drawings that the portion 45 of the bulb adjacent thev member 43 is of greater elasticity than the portion or member 43, whereby upon pressing the bulb from its bottom a more complete collapsing of the bulb is obtained, as shown by dotted lines in Fie'. 9.

Any one of the several above described means may be employed for attaching the bulb to the` cup.

Fig. illustrates another form` of the invention in which a ring member 46 is provided for cooperating with the internal surface of the bowl l2 adjacent latter open end and the eX- ternal lower portion of the bulb. The open end of the bulb in this embodiment is provided with a portion 47 turned back on the end of the bulb, and forming an annular opening for receiving the lower end of the ring The lower end of the ring 46 being smaller in diameter, both internally and externally, than any other portion of the ring, a threaded means 48 is provided for connecting the ring 46 with the cup 48. The lower edge of the portion 47 is provided with a lip portion 49 for seating on a cooperating beveled portion 5l provided withinthe cup, rigid contact between the corresponding edge and beveled portions 49 and 5l being effected by the threaded means 48.

Fig. 11 illustrates still another embodiment of the invention wherein the bulb is adapted to be collapsed from its sides, the closed end of the bulb being formed as shown at 54, whereby upon collapsing said bulb from its sides, the portion 54 folds together, as shown by the dotted lines 55, or may be formed as in Fig. 5. The open end of the bulb may employ any of the attaching means described above or engaging a cap portion represented in its entirety by 56. The cap portion 56 is provided with a central cone-shaped portion 57, the apex of which extends into the open end of the bulb, as shown. This construction provides a surface for cooperating with the corresponding inner surface of the bowl when the latter is in collapsed position and effecting a more complete discharge of the substance within the bowl. Bracing members 58 are provided at the large or open end of the cone 57 and adapted to engage and support the tubular ejector l1 as shown at 59, the inner end of the ejector 11 being threaded into the apex of the cone 57.

While I have illustrated and described the invention in connection with certain forms of connectionsand shapes-of the various elements, it

will be obvious to those skilled in the art that certain changes, modifications, substitutions, ad-

ditions and omissions may be made in the several structures without departing from the spirit and scope of the invention, as defined by the appended claims.

I claim:-

1. A syringe device of the character described, comprising a bowl provided on its inner wall with a portion tapered downwardly and inwardly relative to the axis of the bowl, said bowl including means at its open end for connectively mounting a bulb internally of the open end of the bowl, and a bulb of resilient material having a closed end and an open end, said open end including means for cooperating with the connective means at the open end of the bowl for providing connective engagement between bulb and bowl, the connective means of the bulb being in spaced relation to the edge at the open end of the bulb, whereby the edge portion at the open end of the bulb may be deformable by seating on the inner taper of the bowl.

2. A bulb structure for syringes comprising a collapsible cupped body of resilient material having an open end and a closed end, the center of said closed end being formed with a depression projecting inwardly longitudinally to the axis of said body, said body adjacent its open end including a laterally projecting portion in spaced relation to its extreme end edge, said last mentioned projecting portion being deformable radially inwardly of the body.

3. A bulb for syringes 'fin accordance with claim 2 wherein a button is provided centrally in the depression in the closed end of the body, the diameter of said depression being less than the exterior diameter of the body and the diameter of the button being less than the diameter of the depression.

4. In a syringe, a cup member formed of rigid material having a plurality of internal grooves terminating at its open end, a bulb having an open end, said open end terminating in a beveled resilient lip, a ring member embedded within said bulb adjacent said lip, said ring member having a plurality of struck up portions adapted to engage said grooves for flexing said lip against the inner wall of the said cup member.

5. In a syringe, a bowl member having a beveled inner portion, a bulb having an open end, said open end terminating in a beveled lip, the latter-being adapted to seat on the beveled portion within said bowl, and means for flexing said lip radially inwardly in wedging relation with said inner portion within said bowl.

6. In a syringe, a bowl member, a bulb member, a means for `connecting said bowl member with saidbulbmember,saidmeans comprising an inter- Amediate ring member having means for engaging the internal surface of both said bowl and bulb member, the second said means adapted to wedge the outer edge of the bulb member in close contactwith the inner surface of said bowl member, a portion of said ring member lying within said bowl member and thel remaining portion of said ring member lying within said bulb member.

7. In a syringe, a cup-shaped member, a bulb member having an open end, said open end terminating with a portion folded back on itself radially outwardly and forming an annular groove, a ring member disposed in said groove and having means for engaging said cup member and preventing lateral movement of said folded portion with respect to said cup member.

GEORGE N. HEIN. 

